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https://issues.apache.org/jira/browse/OAK-11444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17927916#comment-17927916
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Rishabh Daim commented on OAK-11444:
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I wouldn't pollute SETTINGS collection with such a huge amount of data.
Also, deleted docs & empty props aren't exactly SETTINGS, so I didn't make
sense to save them inside SETTINGS collections.
I would propose that either we save them inside an entirely new collection
(e.g. bin) or we should save them inside the NODES collections itself under a
path such that they are neither accessible from UI nor from indexes.
Note: Both the above storage options should be disabled by default and behind
an FT or OSGi config.
cc [~reschke] [~thomasm]
> [full-gc] Save document id and empty properties names before deletion
> ----------------------------------------------------------------------
>
> Key: OAK-11444
> URL: https://issues.apache.org/jira/browse/OAK-11444
> Project: Jackrabbit Oak
> Issue Type: Story
> Components: mongomk
> Reporter: Daniel Iancu
> Priority: Major
>
> Store document ID and empty properties names into a dedicated *_bin*
> collection
> before physically deletion from Mongo nodes collection during full gc.
> Motivation behind this change is that in case of accidentally deleting data
> that should have not been deleted (not garbage) this `log` of removed
> documents and properties will help the complete restoration from backup.
> A separate collection was preferred instead of logging to files because is
> more reliable. Logs usually needs to be exported to platform like Splunk and
> the process does not guarantee that all logs are saved.
> The data saved in *_bin* collection is temporary, the cleaning can be done
> via setting document TTL or by using an external job to remove it.
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